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Pattern puzzles are a sub-class of Put-Together puzzles.
They consist of a number of similar pieces or movable parts, each of which has some particular identifying trait or traits whose values are chosen from a small well-defined set - sometimes shape, but more often a color or pattern, along the edges or on the face(s) of the piece.
Interest in the brand has doubled since Kate’s appearance.
As with everything else to do with Kate, the Americans in particular have been putting in their orders.
Major Percy Alexander Mac Mahon and his friend Major Julian R.
Jocelyn applied for a patent in Great Britian in 1892 (#3297 - I could not find a copy online - it is reproduced in Haubrich's About,...) in which they describe several triangular tile games and puzzles.
According to Haubrich, and to Slocum and Botermans in their 1986 book Puzzles Old and New, the first edge-matching puzzle patent was applied for in 1880 by Edwin Lajette Thurston of Cleveland, Ohio (b.1857 in MA, d.1921) and granted in 1892 - see 487798; also see 1893's 490689. For a precursor to the edge-matching puzzle, using triangular tiles like "Triominoes," see U. He never uses the word "puzzle" - he describes a number of games but none come close to being a puzzle.
In Hoffmann's 1893 Puzzles Old and New, the only edge-matching type puzzles mentioned are #72 in chapter IV "The Royal Aquarium Thirteen Puzzle" (equivalent to the French Le Nombre Treize), and #18 in chapter III "The Endless Chain" (equivalent to the French La Chaine sans Fin).
Jacques Haubrich published his definitive Compendium of Card Matching Puzzles in three volumes, in which he describes over 1000 puzzles, and a companion volume called About, Beyond, and Behind Card Matching Puzzles in which he provides interesting theoretical and historical analyses. Richards doesn't claim the triangular form of the dominoes, but rather the ways to make and mark them.
The goal is to arrange the pieces in some simple configuration such that their features respect a given rule (or rules) - form a pattern - occasionally but not typically enforced by mechanical means.
For example, "piece features at specific points (e.g.
You can read more on this topic in Erik and Martin Demaine's 2007 paper Jigsaw Puzzles, Edge Matching, and Polyomino Packing: Connections and Complexity ( download a PDF here ).
Edge-Matching puzzles usually consist of a set of tiles whose edges have various distinct patterns, symbols, or colors.